I haven't filed my taxes but received a deposit from the IRS Treas

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@maviviana wrote:

but I have NOT filed my taxes yet for this year for my 2024 return.

No one here in a user community forum is going to know specifically why CA FTB sent you the money or even what tax year it was for.   Perhaps they corrected a past return (in which case you may also get a letter in a couple weeks.)    In any case, you can phone the CA Franchise Tax Board during their business hours to directly inquire about it and have them explain it.  I believe they also have online chat.

Here's how to get to their contact site:

https://ttlc.intuit.com/turbotax-support/en-us/help-article/state-taxes/contact-state-department-revenue/L9qVToi02_US_en_US

ADDENDUM NOTE:  3/08/2025  5:50 PM Pacific

Also see the next comment below that Tax Expert @AmyC  just left you that warns about a possible scam.   Be sure and talk to the California FTB to see what is going on.